RT Journal Article SR Electronic T1 Bilateral Micronodular Pulmonary Infiltrate: Is It Important to Make a Histological Diagnosis? JF Respiratory Care FD American Association for Respiratory Care SP e69 OP e71 DO 10.4187/respcare.02036 VO 58 IS 7 A1 Kashif Ali Khan A1 JJ Gilmartin YR 2013 UL http://rc.rcjournal.com/content/58/7/e69.abstract AB Pulmonary alveolar microlithiasis is a rare disease characterized by the deposition of calcium phosphate within the alveoli. We report the case of a 20-year-old man with a 6-week history of cough and shortness of breath on exertion. The chest radiograph demonstrated a bilateral symmetrical micronodular pattern. High-resolution computed tomography revealed bilateral diffuse fine nodular shadowing involving the mid zones, with sparing of the apices. The patient underwent a transbronchial lung biopsy, which confirmed the diagnosis of pulmonary alveolar microlithiasis.